Just as an aside, I wouldn't personally make it a HUGE priority to see the lighting. If you're in the area, great, but several years ago we rushed from DCA (missing riding Soarin', my mom's favorite!) just to see the "lighting." Not surprisingly, we were not particularly impressed.
It's definitely a nice bonus if you're around, but even if you have plans to see it, I wouldn't specifically miss out on doing something else to get there--unless it's gotten notably more impressive since circa 2009.